CN105969437A - Dehydration device of natural gas, switching control method and system - Google Patents
Dehydration device of natural gas, switching control method and system Download PDFInfo
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- CN105969437A CN105969437A CN201610184307.0A CN201610184307A CN105969437A CN 105969437 A CN105969437 A CN 105969437A CN 201610184307 A CN201610184307 A CN 201610184307A CN 105969437 A CN105969437 A CN 105969437A
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- valve
- mode
- control
- molecular sieve
- dehydration device
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/542—Adsorption of impurities during preparation or upgrading of a fuel
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Gases (AREA)
Abstract
The application provides a dehydration device of natural gas, a switching control method and a system. The method comprises the following steps: when entering a first work pattern, controlling to open third and fifth valves, controlling to close fourth and sixth valves, controlling to open second and eighth valves, controlling to close first and seventh valves, and controlling to start a heater in generation equipment; when switching to a second work pattern from the first work pattern, keeping current state of the eight valves unchanged, and controlling to turn off the heater; when switching to a third work pattern from the second work pattern, controlling to open the fourth and sixth valves, controlling to close the third and fifth valves, controlling to open the first and seventh valves, controlling to close the second and eighth valves, and controlling to start the heater; and when switching to a fourth work pattern from a third work pattern, keeping the state of the eight valves unchanged, and controlling to turn off the heater. Costs of equipment installation and maintenance are reduced. Switching and control logic of valves is simple. Operability and safety of the dehydration device are enhanced.
Description
Technical field
The present invention relates to derived energy chemical technical field, particularly relate to the dehydration device of a kind of natural gas, switching
Control method and system.
Background technology
The natural gas that long-distance transport pipes conveying comes needs to carry out dehydrate through dewatering system, and dewatering system takes off
After going out moisture, the water dew point in natural gas is made to reach less than-70 DEG C.In prior art, for natural
The dewatering system that gas carries out being dehydrated generally is controlled valve by 3 molecular sieve equipments and up to 13 and forms.
Dewatering system of the prior art is more due to valve, therefore, installs and safeguards cumbersome, work
Journey is relatively costly.Meanwhile, valve is more causes switch control logic complicated, if valve transfer control is improper
It is likely to cause equipment damage.
Summary of the invention
In view of this, the invention provides dehydration device, method for handover control and the system of a kind of natural gas,
More in order to solve the valve of dewatering system of the prior art setting, cause installing and safeguarding number
Tired, engineering cost is higher, and system control logic is complicated, if valve transfer controls improper being likely to
The problem causing equipment damage, its technical scheme is as follows:
The dehydration device of a kind of natural gas, described device includes: the first molecular sieve equipment, the second molecular sieve
Equipment, again generating apparatus, the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve,
6th valve, the 7th valve and the 8th valve；
Described first molecular sieve equipment, for complete under the cooperation of described 3rd valve and described 5th valve
Become the dried of natural gas；
Described generating apparatus again, the portion in the natural gas that described first molecular sieve equipment output is dried
Divide natural gas to be compressed heat treated or compression processes；
Described second Molecular Devices, is additionally operable under the cooperation of described 8th valve and described second valve complete
Regeneration or the cold blowing of paired described regeneration equipment output natural gas process；
Described second molecular sieve equipment, for complete under the cooperation of described 4th valve and described 6th valve
The dried of paired described natural gas；
Described generating apparatus again, is additionally operable in the natural gas being dried described second molecular sieve equipment output
Portion of natural gas is compressed heat treated or compression processes；
Described first molecular sieve equipment, is additionally operable under the cooperation of described 7th valve and described first valve
The regeneration or the cold blowing that complete the natural gas to the output of described regeneration equipment process.
A kind of method for handover control, is applied to described dehydration device, and described dehydration device includes: first
Mode of operation, the second mode of operation, the 3rd mode of operation and the 4th mode of operation；
Described dehydration device can be switched to described second mode of operation by described first mode of operation, by described
Second mode of operation switches to described 3rd mode of operation, is switched to described by described 3rd mode of operation
Four mode of operations；
Described method for handover control includes:
When entering described first mode of operation, control the 3rd valve and the 5th valve is opened, control the 4th
Valve and the 6th valve closing, control the second valve and the 8th valve is opened, and controls the first valve and the 7th
Valve closing, controls the heater starting in generating apparatus again；
When being switched to described second mode of operation by described first mode of operation, keep described 3rd valve
It is in open mode with described 5th valve, keeps described 4th valve and the closedown shape of described 6th valve
State, keeps described second valve and the open mode of described 8th valve, keeps described first valve and
The closed mode of seven valves, controls described heater and closes；
When described second mode of operation switches to described three mode of operation, control described 4th valve and
6th valve is opened, and controls described 3rd valve and the 5th valve closing, control described first valve and
Described 7th valve is opened, and controls described second valve and the 8th valve closing, controls described heater
Start；
Described 3rd mode of operation to described 4th mode of operation switching time, keep described 4th valve and
The open mode of the 6th valve, keeps described 3rd valve and the closed mode of the 5th valve, keeps described
First valve and the open mode of described 7th valve, keep described second valve and the closedown of the 8th valve
State, controls described heater and closes.
Wherein, described dehydration device can be switched back into described first mode of operation by described 4th mode of operation；
Described 4th mode of operation to described first mode of operation switching time, control described 3rd valve and
Described 5th valve is opened, and controls described 4th valve and described 6th valve closing, controls described second
Valve and described 8th valve are opened, and control described first valve and described 7th valve closing, control institute
State again the heater starting in generating apparatus.
Wherein, described first mode of operation is the first molecular sieve equipment absorption, the second molecular sieve equipment regeneration,
Described second mode of operation is described first molecular sieve equipment absorption, described second molecular sieve equipment cold blowing,
Described 3rd mode of operation is described first molecular sieve equipment regeneration, described second molecular sieve equipment absorption,
Described 4th mode of operation is described first molecular sieve equipment cold blowing, described second molecular sieve equipment absorption.
Described method also includes:
Determine that described dehydration device is in the duration of described first mode of operation, in order at described dehydration device
When the duration of described first mode of operation arrives preset duration, to described second mode of operation switching；
Determine that described dehydration device is in the duration of described second mode of operation, in order at described dehydration device
When the duration of described second mode of operation arrives described preset duration, cut to described 3rd mode of operation
Change；
Determine that described dehydration device is in the duration of described 3rd mode of operation, in order at described dehydration device
When the duration of described 3rd mode of operation arrives described preset duration, cut to described 4th mode of operation
Change.
A kind of handover control system, including described dehydration device and control unit；
Described dehydration device includes: the first mode of operation, the second mode of operation, the 3rd mode of operation and
Four mode of operations；
Described dehydration device can be switched to described second mode of operation by described first mode of operation, by described
Second mode of operation switches to described 3rd mode of operation, is switched to described by described 3rd mode of operation
Four mode of operations；
Described control unit, for when entering described first mode of operation, controls the 3rd valve and the 5th
Valve is opened, and controls the 4th valve and the 6th valve closing, controls the second valve and the 8th valve is opened,
Control the first valve and the 7th valve closing, control again the heater starting in generating apparatus；
It is additionally operable to when being switched to described second mode of operation by described first mode of operation, keeps described
Three valves and described 5th valve are in open mode, keep described 4th valve and described 6th valve
Closed mode, keeps described second valve and the open mode of described 8th valve, keeps described first valve
Door and the closed mode of the 7th valve, control described heater and close；
It is additionally operable to, when described second mode of operation switches to described three mode of operation, control the described 4th
Valve and the 6th valve are opened, and control described 3rd valve and the 5th valve closing, control described first
Valve and described 7th valve are opened, and control described second valve and the 8th valve closing, control described
Heater starting；
It is additionally operable to, when described 3rd mode of operation switches to described 4th mode of operation, keep the described 4th
Valve and the open mode of the 6th valve, keep described 3rd valve and the closed mode of the 5th valve, protects
Hold described first valve and the open mode of described 7th valve, keep described second valve and the 8th valve
Closed mode, control described heater close.
Wherein, described dehydration device can be switched back into described first mode of operation by described 4th mode of operation；
Described control unit, is additionally operable in described 4th mode of operation to described first mode of operation switching
Time, control described 3rd valve and described 5th valve is opened, control described 4th valve and the described 6th
Valve closing, controls described second valve and described 8th valve is opened, and controls described first valve and institute
State the 7th valve closing, the heater starting in generating apparatus again described in control.
Wherein, described first mode of operation is the first molecular sieve equipment absorption, the second molecular sieve equipment regeneration,
Described second mode of operation is described first molecular sieve equipment absorption, described second molecular sieve equipment cold blowing,
Described 3rd mode of operation is described first molecular sieve equipment regeneration, described second molecular sieve equipment absorption,
Described 3rd duty is described first molecular sieve equipment cold blowing, described second molecular sieve equipment absorption.
Wherein, described control unit, it is additionally operable to determine that described dehydration device is in described first work
The duration of pattern, in order to described dehydration device is in the duration of described first mode of operation and arrives preset duration
Time, control described dehydration device to described second mode of operation switching；
Described control unit, be additionally operable to determine described dehydration device be in described second mode of operation time
It is long, in order to when described dehydration device is in the duration described preset duration of arrival of described second mode of operation,
Control described dehydration device to described 3rd mode of operation switching；
Described control unit, be additionally operable to determine described dehydration device be in described 3rd mode of operation time
It is long, in order to when described dehydration device is in the duration described preset duration of arrival of described 3rd mode of operation,
Control described dehydration device to described 4th mode of operation switching；
Described control unit, be additionally operable to determine described dehydration device be in described 4th mode of operation time
It is long, in order to when described dehydration device is in the duration described preset duration of arrival of described 3rd mode of operation,
Control described dehydration device to described 4th mode of operation switching.
Technique scheme has the advantages that
In dehydration device, method for handover control and the system of the natural gas that the present invention provides, dehydration device is only
Utilize two molecular sieve equipments and eight control valves achieve natural gas be dried, regenerate, cold blowing, with
Dewatering system of the prior art is compared, and the quantity of molecular sieve equipment and valve greatly reduces, and molecular sieve sets
Standby and valve cost of installation and maintenance is substantially reduced, and method for handover control based on dehydration device passes through
Simple switch control logic achieves the switching control to valve, and the switching control of valve is simple, safety,
I.e. improve operability and the safety of dehydration device.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The structural representation of the dehydration device of the natural gas that Fig. 1 provides for the embodiment of the present invention；
One schematic flow sheet of the method for handover control that Fig. 2 provides for the embodiment of the present invention；
Four kinds of work-mode switching process signals in the method for handover control that Fig. 3 provides for the embodiment of the present invention
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Embodiments provide the dehydration device of a kind of natural gas, refer to Fig. 1, it is shown that this dress
The structural representation put, this device may include that the first molecular sieve equipment C101, the second molecular sieve equipment
C102, regeneration equipment R100, the first valve K101, the second valve K102, the 3rd valve K103, the
Four valve K104, the 5th valve K105, the 6th valve K106, the 7th valve K107 and the 8th valve
K108.Wherein:
First molecular sieve equipment C101, in the 3rd valve K103 and the cooperation of the 5th valve K105
Under complete the dried of natural gas.
Regeneration equipment R100, in the natural gas being dried the first molecular sieve equipment C101 output
Portion of natural gas is compressed heat treated or compression processes.
Second molecular sieve equipment C102, in the 8th valve K108 and the cooperation of the second valve K102
Under complete the regeneration equipment R100 output regeneration of natural gas or cold blowing are processed；
Second molecular sieve equipment C102, is additionally operable to joining at the 4th valve K104 and the 6th valve K106
The dried to natural gas is completed under conjunction.
Regeneration equipment R100, is additionally operable in the natural gas being dried the second molecular sieve equipment C102 output
Portion of natural gas be compressed heat treated or compression and process.
First molecular sieve equipment C101, is additionally operable to joining at the 7th valve K107 and the first valve K101
Complete the regeneration to regeneration equipment R100 output natural gas under conjunction or cold blowing processes.
The dehydration device of natural gas that the embodiment of the present invention provides only utilizes two molecular sieve equipments and eight
Valve achieve natural gas be dried, regenerate, cold blowing.Compared with dehydration device of the prior art system,
In the dehydration device of the natural gas that the embodiment of the present invention provides, the quantity of molecular sieve equipment and valve subtracts significantly
Few, the minimizing of molecular sieve equipment and valve quantity makes the cost of installation and maintenance of molecular sieve equipment and valve
It is substantially reduced.
The embodiment of the present invention additionally provides a kind of method for handover control, is applied to the de-of above-described embodiment offer
Water device, this dehydration device includes the first mode of operation, the second mode of operation, the 3rd mode of operation and
Four mode of operations, dehydration device can be switched to the second mode of operation by the first mode of operation, by the second work
Pattern switches to the 3rd mode of operation, is switched to the 4th mode of operation by the 3rd mode of operation, refers to figure
2, it is shown that the schematic flow sheet of method for handover control, method for handover control may include that
Step S201: when entering the first mode of operation, controls the 3rd valve and the 5th valve is opened,
Control the 4th valve and the 6th valve closing, control the second valve and the 8th valve is opened, control the first valve
Door and the 7th valve closing, control the heater starting in generating apparatus again.
Concrete, when the natural gas from natural gas system being detected, control the 3rd valve open so that
Natural gas enters the first molecular sieve and is dried process, when the natural gas that the first molecular sieve equipment output is dried
Time, control the 5th valve and open, so that the part in the first dried natural gas of molecular sieve equipment
Entering generating apparatus again, another part enters miscellaneous equipment and carries out subsequent treatment.
The natural gas entering again generating apparatus is compressed by the Regenerative Compression machine in generating apparatus and heater again
Heat treated, and during natural gas after regenerating equipment output and processing, control the 8th valve and open so that again
The natural gas of generating apparatus output enters the second molecular sieve equipment and regenerates, and defeated at the second molecular sieve equipment
When going out natural gas, control the second valve and open, so that the natural gas via cooling of the second molecular sieve equipment output
Return to natural gas system after separation recycle.
Step S202: when being switched to the second mode of operation by the first mode of operation, keeps the 3rd valve
It is in open mode with the 5th valve, keeps the 4th valve and the closed mode of the 6th valve, keep second
Valve and the open mode of the 8th valve, keep the first valve and the closed mode of the 7th valve, control to add
Hot device cuts out.
Concrete, the first Molecular Devices continues under the cooperation of the 3rd valve and the 5th valve from natural
The natural gas of gas system is dried process.
Control again the heater in generating apparatus to close, only the natural gas entering again generating apparatus is compressed place
Reason, and regenerate equipment output squeezing process after natural gas time, enter the second molecule by the 8th valve
Sieve apparatus carries out cold blowing process, and during natural gas after the second molecular sieve equipment output processes, by the
Two valves return to natural gas system circulation after making the natural gas via refrigerated separation that the second molecular sieve equipment exports
Utilize.
Step S203: when the second mode of operation switches to three mode of operations, control the 4th valve and
6th valve is opened, and controls the 3rd valve and the 5th valve closing, controls the first valve and the 7th valve
Open, and control the second valve and the 8th valve closing, control heater starting.
Concrete, control the 4th valve and open so that natural gas enters the second molecular sieve and is dried, when the
When two molecular sieve equipments export dried natural gas, control the 6th valve and open, so that through the second molecule
Being partly into generating apparatus again in the dried natural gas of sieve apparatus, another part enters miscellaneous equipment and enters
Row subsequent treatment.
Controlling heater starting makes the Regenerative Compression machine in generating apparatus and heater to entering generating apparatus more again
Natural gas be compressed heat treated, and during natural gas after regenerating equipment output and processing, control the
Seven valves are opened so that the natural gas of regeneration equipment output enters the first molecular sieve equipment and regenerates, and
During the first molecular sieve equipment output natural gas, control the first valve and open, so that the first molecular sieve equipment is defeated
Return to natural gas system after the natural gas via refrigerated separation gone out recycle.
Step S204: the 3rd mode of operation to the 4th mode of operation switching time, keep the 4th valve and
The open mode of the 6th valve, keeps the 3rd valve and the closed mode of the 5th valve, keeps the first valve
With the open mode of the 7th valve, keep the second valve and the closed mode of the 8th valve, control heater
Close.
Concrete, the second Molecular Devices continues under the cooperation of the 4th valve and the 6th valve from natural
The natural gas of gas system is dried process.
Control again the heater in generating apparatus to close, only the natural gas entering again generating apparatus is compressed place
Reason, and regenerate equipment output squeezing process after natural gas time, make generating apparatus more defeated by the 7th valve
The natural gas gone out enters the first molecular sieve equipment and carries out cold blowing process, and at the first molecular sieve equipment output
During natural gas after reason, made the natural gas via refrigerated separation of the first molecular sieve equipment output by the first valve
After return to natural gas system and recycle.
In the present embodiment, dehydration device can be switched back into the first mode of operation by the 4th mode of operation and follows
Ring.Then, the method for handover control that above-described embodiment provides can also include: in the 4th mode of operation to the
During one mode of operation switching, control the 3rd valve and the 5th valve is opened, control the 4th valve and the 6th valve
Door is closed, and controls the second valve and the 8th valve is opened, control the first valve and the 7th valve closing, control
Heater starting in preparation, regeneration equipment.
The method for handover control based on the dehydration device illustrated that the embodiment of the present invention provides, by simply
Switch control logic achieve the switching control to eight valves, the switching control of valve is simple, safety,
I.e. improve operability and the safety of dehydration device.
The method for handover control that above-described embodiment provides can also comprise determining that dehydration device is in the first work
The duration of operation mode, in order to dehydration device is in the duration of described first mode of operation and arrives preset duration
Time, to the second mode of operation switching；Determine that dehydration device is in the duration of the second mode of operation, in order to de-
When water device is in the duration arrival preset duration of the second mode of operation, to the 3rd mode of operation switching；Really
Surely dehydration device is in the duration of the 3rd mode of operation, in order to dehydration device be in the 3rd mode of operation time
During long arrival preset duration, to the 4th mode of operation switching；Determine that dehydration device is in the 4th mode of operation
Duration, in order to dehydration device is in the duration of the 4th mode of operation when arriving described preset duration, to the
One mode of operation switching.
In the above-described embodiments, the first mode of operation is that the first molecular sieve equipment adsorbs, the second molecular sieve sets
Standby regeneration, the second mode of operation is the first molecular sieve equipment absorption, the second molecular sieve equipment cold blowing, the 3rd
Mode of operation is the first molecular sieve equipment regeneration, the second molecular sieve equipment absorption, and the 3rd duty is the
A part sieve apparatus cold blowing, the second molecular sieve equipment absorption.
Below in conjunction with Fig. 3 and Fig. 1, the method for handover control providing the embodiment of the present invention is carried out specifically
Bright:
Enter the first mode of operation: molecular sieve-4 A absorption, molecular sieve B regenerate:
(1) control the 3rd valve K103, the 5th valve K105 to open；
(2) control the 4th valve K104, the 6th valve K106 closes；
(3) control the second valve K102, the 8th valve K108 opens；
(4) control the first valve K101, the 7th valve K107 closes；
(5) heater starting in generating apparatus is controlled again.
Enter the second mode of operation: molecular sieve-4 A adsorbs, molecular sieve B cold blowing:
(1) the 3rd valve K103, the 5th valve K105 is kept to open；
(2) the 4th valve K104, the 6th valve K106 is kept to close；
(3) the second valve K102, the 8th valve K108 is kept to open；
(4) the first valve K101, the 7th valve K107 is kept to close；
(5) control again the heater in generating apparatus to close.
Enter the 3rd mode of operation: molecular sieve-4 A regeneration, molecular sieve B adsorb:
(1) control the 4th valve K104, the 6th valve K106 to open；
(2) control the 3rd valve K103, the 5th valve K105 closes；
(3) control the first valve K101, the 7th valve K107 opens；
(4) control the second valve K102, the 8th valve K108 closes；
(5) heater starting in generating apparatus is controlled again.
Enter the 4th mode of operation: molecular sieve-4 A cold blowing, molecular sieve B adsorb:
(1) the 4th valve K104, the 6th valve K106 is kept to open；
(2) the 3rd valve K103, the 5th valve K105 is kept to close；
(3) the first valve K101, the 7th valve K107 is kept to open；
(4) the second valve K102, the 8th valve K108 is kept to close；
(5) control again the heater in generating apparatus to close.
Return the first mode of operation: molecular sieve-4 A absorption, molecular sieve B regenerate:
(1) control the 3rd valve K103, the 5th valve K105 to open；
(2) control the 4th valve K104, the 6th valve K106 closes；
(3) control the second valve K102, the 8th valve K108 opens；
(4) control the first valve K101, the 7th valve K107 closes；
(5) heater starting in generating apparatus is controlled again.
It is circulated realization by above-mentioned 4 mode of operations natural gas to be dried, regenerates and cold blowing.
The embodiment of the present invention additionally provides a kind of handover control system, and this system includes being dehydrated device and control
Unit.Wherein, dehydration device can be the dehydration device based on natural gas that above-described embodiment provides, its
Concrete structure sees accompanying drawing 1 and above-described embodiment, and therefore not to repeat here.
Wherein, dehydration device includes the first mode of operation, the second mode of operation, the 3rd mode of operation and the
Four mode of operations, and, dehydration device can be switched to the second mode of operation by the first mode of operation, by the
Two mode of operations switch to the 3rd mode of operation, are switched to the 4th mode of operation by the 3rd mode of operation.
Control unit, for when entering described first mode of operation, controls the 3rd valve and the 5th valve
Open, control the 4th valve and the 6th valve closing, control the second valve and the 8th valve is opened, control
First valve and the 7th valve closing, control the heater starting in generating apparatus again.
Control unit, is additionally operable to when being switched to described second mode of operation by described first mode of operation,
Keep described 3rd valve and described 5th valve to be in open mode, keep described 4th valve and described
The closed mode of the 6th valve, keeps described second valve and the open mode of described 8th valve, keeps
Described first valve and the closed mode of the 7th valve, control described heater and close.
Control unit, is additionally operable to when described second mode of operation switches to described three mode of operation, control
Make described 4th valve and the 6th valve is opened, and control described 3rd valve and the 5th valve closing, control
Make described first valve and described 7th valve is opened, and control described second valve and the 8th valve pass
Close, control described heater starting.
Control unit, is additionally operable to, when described 3rd mode of operation switches to described 4th mode of operation, protect
Hold described 4th valve and the open mode of the 6th valve, keep described 3rd valve and the pass of the 5th valve
Closed state, keeps described first valve and the open mode of described 7th valve, keeps described second valve
With the closed mode of the 8th valve, control described heater and close.
The embodiment of the present invention provide based on the handover control system illustrated, by simple switching control
The logic realization switching control to eight valves, the switching control of valve is simple, safety, i.e. improves
The operability of dehydration device and safety.
In the above-described embodiments, dehydration device also can be switched back into the first mode of operation by the 4th mode of operation,
It is circulated.Then control unit, is additionally operable to when the 4th mode of operation switches to the first mode of operation, control
Make the 3rd valve and described 5th valve is opened, control the 4th valve and described 6th valve closing, control
Second valve and described 8th valve are opened, and control the first valve and the 7th valve closing, control regeneration and set
Heater starting in Bei.
In the above-described embodiments, the first mode of operation is that the first molecular sieve equipment adsorbs, the second molecular sieve sets
Standby regeneration；Second mode of operation is the first molecular sieve equipment absorption, the second molecular sieve equipment cold blowing；3rd
Mode of operation is the first molecular sieve equipment regeneration, the second molecular sieve equipment absorption；4th duty is
A part sieve apparatus cold blowing, the second molecular sieve equipment absorption.
In the above-described embodiments, control unit, it is additionally operable to determine that dehydration device is in the first mode of operation
Duration, in order to when dehydration device is in the duration arrival preset duration of the first mode of operation, control dehydration dress
Put to the second mode of operation switching.
Control unit, is additionally operable to determine the duration that dehydration device is in the second mode of operation, in order to dehydration dress
When putting the duration arrival preset duration being in the second mode of operation, control dehydration device to the 3rd mode of operation
Switching.
Control unit, is additionally operable to determine the duration that dehydration device is in the 3rd mode of operation, in order to dehydration dress
When putting the duration arrival preset duration being in the 3rd mode of operation, control dehydration device to the 4th mode of operation
Switching.
Control unit, is additionally operable to determine the duration that dehydration device is in the 4th mode of operation, in order to dehydration dress
When putting the duration arrival preset duration being in the 3rd mode of operation, control dehydration device to described 4th work
Pattern switches.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
In several embodiments provided herein, it should be understood that disclosed method, device and
Equipment, can realize by another way.Such as, device embodiment described above is only shown
Meaning property, such as, the division of described unit, be only a kind of logic function and divide, actual can when realizing
There to be other dividing mode, the most multiple unit or assembly can in conjunction with or be desirably integrated into another
System, or some features can ignore, or do not perform.
The described unit illustrated as separating component can be or may not be physically separate, makees
The parts shown for unit can be or may not be physical location, i.e. may be located at a place,
Or can also be distributed on multiple NE.Can select according to the actual needs part therein or
The whole unit of person realizes the purpose of the present embodiment scheme.It addition, each in each embodiment of the present invention
Functional unit can be integrated in a processing unit, it is also possible to is that unit is individually physically present, also
Can be integrated in a unit with two or more unit.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
Seeing, generic principles defined herein can be in the situation without departing from the spirit or scope of the present invention
Under, realize in other embodiments.Therefore, the present invention is not intended to be limited to these realities shown in this article
Execute example, and be to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (9)
1. the dehydration device of a natural gas, it is characterised in that described device includes: the first molecular sieve
Equipment, the second molecular sieve equipment, again generating apparatus, the first valve, the second valve, the 3rd valve,
Four valves, the 5th valve, the 6th valve, the 7th valve and the 8th valve；
Described first molecular sieve equipment, under the cooperation of described 3rd valve and described 5th valve
Complete the dried of natural gas；
Described generating apparatus again, in the natural gas being dried described first molecular sieve equipment output
Portion of natural gas is compressed heat treated or compression processes；
Described second Molecular Devices, is additionally operable under the cooperation of described 8th valve and described second valve
Complete the regeneration to described regeneration equipment output natural gas or cold blowing processes；
Described second molecular sieve equipment, under the cooperation of described 4th valve and described 6th valve
Complete the dried to described natural gas；
Described generating apparatus again, is additionally operable in the natural gas being dried described second molecular sieve equipment output
Portion of natural gas be compressed heat treated or compression and process；
Described first molecular sieve equipment, is additionally operable in described 7th valve and the cooperation of described first valve
Under complete the regeneration of natural gas to the output of described regeneration equipment or cold blowing processes.
2. a method for handover control, it is characterised in that be applied to be dehydrated as claimed in claim 1
Device, described dehydration device includes: the first mode of operation, the second mode of operation, the 3rd mode of operation
With the 4th mode of operation；
Described dehydration device can be switched to described second mode of operation by described first mode of operation, by institute
State the second mode of operation to switch to described 3rd mode of operation, switched to institute by described 3rd mode of operation
State the 4th mode of operation；
Described method for handover control includes:
When entering described first mode of operation, control the 3rd valve and the 5th valve and open, control the
Four valves and the 6th valve closing, control the second valve and the 8th valve is opened, control the first valve and
7th valve closing, controls the heater starting in generating apparatus again；
When being switched to described second mode of operation by described first mode of operation, keep described 3rd valve
Door and described 5th valve are in open mode, keep described 4th valve and the pass of described 6th valve
Closed state, keeps described second valve and the open mode of described 8th valve, keeps described first valve
Door and the closed mode of the 7th valve, control described heater and close；
When described second mode of operation switches to described three mode of operation, control described 4th valve
Open with the 6th valve, and control described 3rd valve and the 5th valve closing, control described first valve
Door and described 7th valve are opened, and control described second valve and the 8th valve closing, control described
Heater starting；
When described 3rd mode of operation switches to described 4th mode of operation, keep described 4th valve
With the open mode of the 6th valve, keep described 3rd valve and the closed mode of the 5th valve, keep
Described first valve and the open mode of described 7th valve, keep described second valve and the 8th valve
Closed mode, control described heater close.
Method the most according to claim 2, it is characterised in that described dehydration device can be by described
4th mode of operation switches back into described first mode of operation；
When described 4th mode of operation switches to described first mode of operation, control described 3rd valve
Open with described 5th valve, control described 4th valve and described 6th valve closing, control described
Second valve and described 8th valve are opened, and control described first valve and described 7th valve closing,
Heater starting in generating apparatus again described in control.
The most according to the method in claim 2 or 3, it is characterised in that described first mode of operation
Being the first molecular sieve equipment absorption, the second molecular sieve equipment regeneration, described second mode of operation is described
First molecular sieve equipment absorption, described second molecular sieve equipment cold blowing, described 3rd mode of operation is institute
Stating the first molecular sieve equipment regeneration, described second molecular sieve equipment absorption, described 4th mode of operation is
Described first molecular sieve equipment cold blowing, described second molecular sieve equipment absorption.
Method the most according to claim 2, it is characterised in that described method also includes:
Determine that described dehydration device is in the duration of described first mode of operation, in order to described dehydration device
When being in the duration arrival preset duration of described first mode of operation, to described second mode of operation switching；
Determine that described dehydration device is in the duration of described second mode of operation, in order to described dehydration device
When being in the duration described preset duration of arrival of described second mode of operation, to described 3rd mode of operation
Switching；
Determine that described dehydration device is in the duration of described 3rd mode of operation, in order to described dehydration device
When being in the duration described preset duration of arrival of described 3rd mode of operation, to described 4th mode of operation
Switching.
6. a handover control system, it is characterised in that include being dehydrated as claimed in claim 1 dress
Put and control unit；
Described dehydration device includes: the first mode of operation, the second mode of operation, the 3rd mode of operation and
4th mode of operation；
Described dehydration device can be switched to described second mode of operation by described first mode of operation, by institute
State the second mode of operation to switch to described 3rd mode of operation, switched to institute by described 3rd mode of operation
State the 4th mode of operation；
Described control unit, for when entering described first mode of operation, controls the 3rd valve and the
Five valves are opened, and control the 4th valve and the 6th valve closing, control the second valve and the 8th valve is beaten
Open, control the first valve and the 7th valve closing, control again the heater starting in generating apparatus；
It is additionally operable to when being switched to described second mode of operation by described first mode of operation, keeps described
3rd valve and described 5th valve are in open mode, keep described 4th valve and described 6th valve
The closed mode of door, keeps described second valve and the open mode of described 8th valve, keeps described
First valve and the closed mode of the 7th valve, control described heater and close；
It is additionally operable to when described second mode of operation switches to described three mode of operation, controls described
Four valves and the 6th valve are opened, and control described 3rd valve and the 5th valve closing, control described
First valve and described 7th valve are opened, and control described second valve and the 8th valve closing, control
Make described heater starting；
Be additionally operable to described 3rd mode of operation to described 4th mode of operation switching time, keep described the
Four valves and the open mode of the 6th valve, keep described 3rd valve and the closed mode of the 5th valve,
Keep described first valve and the open mode of described 7th valve, keep described second valve and the 8th
The closed mode of valve, controls described heater and closes.
System the most according to claim 6, it is characterised in that described dehydration device can be by described
4th mode of operation switches back into described first mode of operation；
Described control unit, is additionally operable in described 4th mode of operation to described first mode of operation switching
Time, control described 3rd valve and described 5th valve is opened, control described 4th valve and described
Six valve closings, control described second valve and described 8th valve is opened, and control described first valve
With described 7th valve closing, the heater starting in generating apparatus again described in control.
8. according to the system described in claim 6 or 7, it is characterised in that described first mode of operation
Being the first molecular sieve equipment absorption, the second molecular sieve equipment regeneration, described second mode of operation is described
First molecular sieve equipment absorption, described second molecular sieve equipment cold blowing, described 3rd mode of operation is institute
Stating the first molecular sieve equipment regeneration, described second molecular sieve equipment absorption, described 3rd duty is
Described first molecular sieve equipment cold blowing, described second molecular sieve equipment absorption.
System the most according to claim 6, it is characterised in that described control unit, is additionally operable to
Determine that described dehydration device is in the duration to described first mode of operation, in order at described dehydration device
When the duration of described first mode of operation arrives preset duration, control described dehydration device to described the
Two mode of operation switchings；
Described control unit, be additionally operable to determine described dehydration device be in described second mode of operation time
It is long, in order to when described dehydration device is in the duration described preset duration of arrival of described second mode of operation,
Control described dehydration device to described 3rd mode of operation switching；
Described control unit, be additionally operable to determine described dehydration device be in described 3rd mode of operation time
It is long, in order to when described dehydration device is in the duration described preset duration of arrival of described 3rd mode of operation,
Control described dehydration device to described 4th mode of operation switching；
Described control unit, be additionally operable to determine described dehydration device be in described 4th mode of operation time
It is long, in order to when described dehydration device is in the duration described preset duration of arrival of described 3rd mode of operation,
Control described dehydration device to described 4th mode of operation switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184307.0A CN105969437A (en) | 2016-03-28 | 2016-03-28 | Dehydration device of natural gas, switching control method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184307.0A CN105969437A (en) | 2016-03-28 | 2016-03-28 | Dehydration device of natural gas, switching control method and system |
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